Dallah Thaun's Luck( Races of the Wild, p. 149)
You can rely on a good dose of luck to get you through almost any scrape. Other halflings say the blessing of Dallah Thaun is upon you.
Cha 13, Halfling,
Once per day, you can opt to gain a +5 luck bonus on a single saving throw. However, if you use this ability, you gain a -2 penalty on all other saving throws until sunrise the next morning.